The lread-ns-kw-map branch lgtm (for the superficial judgement I can make) I noticed that the following forms don't have test coverage (?):

^::foo
^::foo/bar
^{::foo ...}
^{::foo/bar ...}

Very interesting @vemv thanks for sharing! This will definitely result in improvements, at the very least to the docs! Let’s start with: > let’s say I want to replace `x` with `^::foo x`, how would that be done? The doc might be scarce yet on that front Here is one way:

(require '[rewrite-cljc.zip :as z]
         '[rewrite-cljc.node :as n])

(let [zloc (z/of-string  "x")]
  (-> zloc
      (z/replace (n/meta-node [(n/keyword-node :foo true)
                               (n/whitespace-node " ")
                               (z/node zloc)]))
      z/root-string))
;; => "^::foo x"

As for: > (note that `^::foo x` is textually different from `^{::foo true} x`, even if functionally equivalent. One should be able to specify one or the other resulting format) Here’s one way to create the nodes from the node API:

(require '[rewrite-cljc.node :as n])

(def n1 (n/meta-node (n/keyword-node :foo true) (n/token-node 'x)))
(n/string n1)
;; => "^::foo x"

(def n2 (n/meta-node (n/map-node [(n/keyword-node :foo true)
                                  (n/whitespace-node " ")
                                  (n/token-node 'true)])
                     (n/token-node 'x)))
(n/string n2)
;; => "^{::foo true} x"

(meta (n/sexpr n1))
;; => #:user{:foo true}
(meta (n/sexpr n2))
;; => #:user{:foo true}
(= (meta (n/sexpr n1)) (meta (n/sexpr n2)))
;; => true

Fantastic, thank you! Tried out. I'd be happy if these were added to the test suite as I'm writing a program that would depend on this feature

Great stuff! Yeah, I think that adding some tests makes good sense. The above examples, or something similar, would be good to add to the introduction document. The node creation fn docstrings could use some love/examples too. I certainly found them mysterious when first looking at them.